Warbling water pump??

[Konstantin Bogach]

I made tension even less.  I can twist best probably 110 degrees.  Still
warbles.

Konstantin.


Bill Phelps wrote:

> When I did mine, I tensioned the belt per the Book of Bentley... so it can
> only be twisted 90 degrees I think.. and it still makes the noise... I've
> always wondered if it is some kind of cavitation in the water pump chamber
> that causes the problem. All I know is that it is at a very specific RPM,
> just off idle. Not a big deal, just kinda bugs me..
>
> Thanks for all the input.
>
> Bill